Hi.,
Please have a look at this video for creating single page website http://recordit.co/ccjdlFt8sd using this theme. We have just explained with only 2 menus. You can create any number of menus in the same method.
If you are happy with our support, kindly rate us. Have a look at the video for the rating process. http://recordit.co/YqdTBuEJRm Hoping for a 5 star rating from your end 🙂